Heterotopic ossification in adenocarcinoma of the colon.

Heterotopic ossification occurring in large-bowel carcinoma and/or its metastasis is a rare entity. There had been only 33 cases reported in the literature by 1992. Isolated wound recurrence after surgery for colorectal carcinomas is also relatively uncommon. Hughes et al studied the surgery results of 1 603 patients with large-bowel cancer and found 11 patients (0.7%) having recurrent tumor in the abdominal wall scar. The finding of malignant epithelial cells and benign bone trabeculae in adenocarcinoma of the colon and its incisional recurrence is an exceedingly rare phenomenon. Herein, an unusual case of colonic carcinoma with an isolated abdominal wall scar recurrence was presented, in which heterotopic ossification was associated with primary and metastatic adenocarcinomas.